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<p><i>Neoseiulus barkeri</i> (Hughes) (Acari: Phytoseiidae)&#xa0;is widely used for the control of small sucking arthropods in various greenhouse and outdoor crops. In Sanya, Hainan, China, <i>N. barkeri</i> co-occurs on cowpea (<i>Vigna unguiculata</i>) with <i>Lasioseius scapulatus</i> (Kennett) (Acari: Blattisociidae), with both mites preying on thrips. This study measured the level of intraguild predation (IGP) between these two predatory mites and assessed the impact of the level of IGP on the efficacy of <i>N. barkeri</i> against the bean flower thrips, <i>Megalurothrips usitatus</i>&#xa0;(Bagnall) (Thysanoptera: Thripidae). We found that larvae of <i>L. scapulatus</i> and <i>N. barkeri</i> were the stages most susceptible to intraguild predation (i.e., the best IG-prey). The level of IGP imposed by <i>L. scapulatus</i> on <i>N. barkeri</i> was greater than the converse relationship because <i>L. scapulatus</i> could attack and subdue <i>N. barkeri</i> more easily than it could attack the pest thrips, <i>M. usitatus.</i> A field experiment demonstrated that the density of the pest thrips did not differ significantly in plots with releases of both predator mites (i.e., the IGP treatment) and plots with releases of only <i>N. barkeri</i>. Also, co-occurring releases of <i>L. scapulatus</i> reduced the level of thrips biological control provided by releases of <i>N. barkeri</i> alone.</p>

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Impact of intraguild predation between Neoseiulus barkeri and Lasioseius scapulatus on thrips control in cowpea

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • Yuanming Chi,
  • Chen Yu,
  • Yilin Zhu,
  • Kai Shu,
  • Ying Gong,
  • Huiyin Yang,
  • Ning Nong,
  • Zihan Zhao,
  • Mingyue Feng,
  • Maoqing Li,
  • Yanyu Chen,
  • Xinzheng Huang,
  • WangPeng Shi

摘要

Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae) is widely used for the control of small sucking arthropods in various greenhouse and outdoor crops. In Sanya, Hainan, China, N. barkeri co-occurs on cowpea (Vigna unguiculata) with Lasioseius scapulatus (Kennett) (Acari: Blattisociidae), with both mites preying on thrips. This study measured the level of intraguild predation (IGP) between these two predatory mites and assessed the impact of the level of IGP on the efficacy of N. barkeri against the bean flower thrips, Megalurothrips usitatus (Bagnall) (Thysanoptera: Thripidae). We found that larvae of L. scapulatus and N. barkeri were the stages most susceptible to intraguild predation (i.e., the best IG-prey). The level of IGP imposed by L. scapulatus on N. barkeri was greater than the converse relationship because L. scapulatus could attack and subdue N. barkeri more easily than it could attack the pest thrips, M. usitatus. A field experiment demonstrated that the density of the pest thrips did not differ significantly in plots with releases of both predator mites (i.e., the IGP treatment) and plots with releases of only N. barkeri. Also, co-occurring releases of L. scapulatus reduced the level of thrips biological control provided by releases of N. barkeri alone.